XML 80 R52.htm IDEA: XBRL DOCUMENT
v3.20.4

Net Other Operating Income (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2020
Analysis of income and expense [abstract] |
Disclosure of components of net other operating (income) losses | Net other operating income includes the following:
Year ended Dec. 31 | 2020 | 2019 | 2018
Coal supply agreement | 29 |  | — |  | — |
Alberta Off-Coal Agreement | (40) |  | (40) |  | (40) |
Insurance recoveries | — |  | (10) |  | (7) |
Other expenses | — |  | 1 |  | — |
Net other operating income | (11) |  | (49) |  | (47) |

X
- References No definition available. + Details
Name: | ifrs-full_AnalysisOfIncomeAndExpenseAbstract
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Disclosure of components of net other operating (income) losses [Table Text Block] + References No definition available. + Details
Name: | tac_DisclosureofcomponentsofnetotheroperatingincomelossesTableTextBlock
Namespace Prefix: | tac_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration